Andrew Lincoln as deputy sheriff Rick Grimes. (Getty Images) You may not be familiar with Andrew Clutterbuck, a man with a name that even he admits sounds more hobbit than human. Which is why, for the purposes of his acting career -- which is suddenly red hot -- he changed his last name to Lincoln. You can catch him on Sunday nights in AMC's newest hit, "The Walking Dead." Lincoln plays the earnest, and decidedly American, Rick Grimes -- a small-town Georgia sheriff who finds himself leading a group of survivors through lots of gutsy escapades after zombies take over the world. How did a British actor (one who is most often remembered by Americans as a lovesick friend opposite Keira Knightley in "Love Actually") end up playing a Southern sheriff? "I always say I got it because my son had just been born and I hadn't slept for...

"Walking Dead" has shuffled past George Romero, right into Bizarro World territory. Assuming that a drama about a world teeming with zombies and the plucky few who manage to avoid becoming dinner isn't already bizarro enough, the four elements below are adding to this author's incredulity and, possibly, affecting the show's overall believability. Again, this assumes that a show about oozing putrescent creatures who want nothing so much as to chomp off your shoulder can have its believability measured. Before we get started, I do need to hand out (perhaps not the best terminology if you watched Sunday's episode) kudos for the show's first truly thrilling surprise zombie attack. Now, on to four plot points that kept me from fully enjoying Sunday's episode. And, yes, there are massive spoilers ahead, so if you haven't watched, bookmark this link for later:...

Caution: spoilers ahead (and in the video above): We're three episodes into "The Walking Dead" and already Rick Grimes is making the kind of maddeningly selfless decisions that, back when "Lost" was on the air, sometimes made us want to bonk Jack Shephard over the head with his backpack. His behavior in last night's episode, "Tell It to the Frogs," made for a great conversation-starter. In fact, I'm sure that many AMC viewers are currently having in-depth discussions about race relations, man's responsibility to his fellow man and how uncool it is when zombies have the audacity to snack on deer that -- hello? -- a hillbilly hunter just killed not five minutes ago. That said, the way Grimes handled a key decision during last night's zombie-pocalypse hour also drove me a little mad. For the rest of my rant regarding Grimes and his pesky, inconvenient conscience, continue reading....